Current theories predict that neutrons will attract each other. It's plausible that some of the things we see in space are composed primarily of neutron, and they seems to have an attractive force proportional to their mass.
Finally, black holes certainly seem to have gravity, and they have nothing outside the event horizon.
Have you considered trying to make your theory apply in these cases?
Finally, black holes certainly seem to have gravity, and they have nothing outside the event horizon.
Have you considered trying to make your theory apply in these cases?